Perfect spin-filter and highly spin-polarized current in a quantum network device
We report a design to realize perfect spin-filter and highly spin-polarized current in a quantum network device composed of multiple quantum dots (QDs). By producing an energy difference between the site energy of the upper QDs and down ones, the linear conductance spectra present well-defined insul...
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| Veröffentlicht in: | Applied physics letters 2012-01, Vol.100 (1), p.013502-013502-3 |
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| container_end_page | 013502-3 |
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| container_title | Applied physics letters |
| container_volume | 100 |
| creator | Fu, Hua-Hua Yao, Kai-Lun |
| description | We report a design to realize perfect spin-filter and highly spin-polarized current in a quantum network device composed of multiple quantum dots (QDs). By producing an energy difference between the site energy of the upper QDs and down ones, the linear conductance spectra present well-defined insulating bands with very steep edges due to the Fano antiresonance in some suitable conditions. Considering a Zeeman splitting, highly to 100% spin-polarized windows appear in the conductance spectra, which makes the network device can be used as a perfect spin filter to generate completely spin-polarized current. This idea opens a practical way to prompt other similar configures of the network to realize perfect spin-filter. |
| doi_str_mv | 10.1063/1.3673840 |
| format | Article |
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By producing an energy difference between the site energy of the upper QDs and down ones, the linear conductance spectra present well-defined insulating bands with very steep edges due to the Fano antiresonance in some suitable conditions. Considering a Zeeman splitting, highly to 100% spin-polarized windows appear in the conductance spectra, which makes the network device can be used as a perfect spin filter to generate completely spin-polarized current. 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By producing an energy difference between the site energy of the upper QDs and down ones, the linear conductance spectra present well-defined insulating bands with very steep edges due to the Fano antiresonance in some suitable conditions. Considering a Zeeman splitting, highly to 100% spin-polarized windows appear in the conductance spectra, which makes the network device can be used as a perfect spin filter to generate completely spin-polarized current. This idea opens a practical way to prompt other similar configures of the network to realize perfect spin-filter.</abstract><pub>American Institute of Physics</pub><doi>10.1063/1.3673840</doi></addata></record> |
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| identifier | ISSN: 0003-6951 |
| ispartof | Applied physics letters, 2012-01, Vol.100 (1), p.013502-013502-3 |
| issn | 0003-6951 1077-3118 |
| language | eng |
| recordid | cdi_crossref_primary_10_1063_1_3673840 |
| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| title | Perfect spin-filter and highly spin-polarized current in a quantum network device |
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